It gives me great pleasure to express my gratitude to all those who gave me the possibility to complete this thesis. I am especially deeply indebted to my supervisor, Associate Professor See Kye Yak, the Deputy Head of the Division of Circuit and System, School of Electrical and Electronic Engineering, whose help, stimulating suggestions and encouragement helped me in all the time of research and the writing of this thesis. I would also like to take this opportunity to thank the Director of the Network Technology Research Centre, Associate Professor Shum Ping, for providing financial support in the form of a research scholarship. I have furthermore to thank Associate Professor So Ping Lam, the Program Director of the Power Line Communication Research Group in the Network Technology Research Centre, for his invaluable guidance, assistance and encouragement throughout my research. My special thanks to research engineers, Mr. Manish Oswal and Mr. Wang Lin Biao, for all their help, support and valuable hints. I would also like to extend my special thanks to my fellow postgraduate research student, Mr. Pang Teng Seng, for his generosity in sharing with me all his knowledge and resources on the characteristics of the power line distribution network. I would also like to express my appreciation to the Network Technology Research Centre technical staff; Mr. Poh Khoon Yong, Madam Thung Lina, Madam Wee-Chew Lee Foong Annie and Mr. Chong Lui Tat Anthony, and also to the technical staff in the Electronic Laboratory II; Madam Koh Guek Hwa, Mr. Wee Seng Khoon and Mr. Tan Hoon Kang, for their technical support and assistance in providing all the necessary equipment in making this research a success. Last but not least, I would also like to give my special thanks to my parents, Mr. Ashari bin Sariman and Madam Kamariah bte Hussein, for their love and unfailing support during my postgraduate study in the Nanyang Technological University. Special tribute goes to my two brothers, Mr. Muhammad Azrine and Mr. Abdullah, whose courage and perseverance in their respective lives have inspired me to continuously pursue excellence in my line of work.